v. 1 tr. a bring up and educate (children). b breed and care for (animals). c cultivate (crops). 2 intr. (of a horse etc.) raise itself on its hind legs. 3 tr. a set upright. b build. c hold upwards (rear one's head). 4 intr. extend to a great height. rearer n.
[ OE rran f. Gmc ]